<template>
<div class="todo-footer" v-show="total">
		<label>
			<!-- <input type="checkbox" :checked="isAll" @change="checkAll"/> -->
			<!-- <input type="checkbox" :checked="isAll" @change="checkAll"/> -->
			<input type="checkbox" v-model="isAll"/>
		</label>
		<span>
			<span>已完成{{doneTotal}}</span> / 全部{{total}}
		</span>
		<button class="btn btn-danger" @click="clearAll">清除已完成任务</button>
	</div>
</template>

<script>
export default {
  name: 'MyFooter',
  props:['todos','checkAllTodo','clearAllTodo'],
  computed:{
	total(){
		return this.todos.length;
	},
	doneTotal(){
		return this.todos.reduce((pre,todo)=>pre+(todo.done?1:0),0)
	},
	// isAll(){
	// 	return this.doneTotal===this.total >0
	// }
	isAll:{
		get(){
			return  this.doneTotal===this.total >0
		},
		set(checked){
			this.checkAllTodo(checked)
		}
	}
  },
  methods:{
	// cheackAll(e){
	// 	console.log(e.targt.checked)
	// 	this.cheackAllTodo(e.targt.checked)
	// }
	clearAll(){
		this.clearAllTodo()
	}
  }
}
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
	/*footer*/
	.todo-footer {
		height: 40px;
		line-height: 40px;
		padding-left: 6px;
		margin-top: 5px;
	}

	.todo-footer label {
		display: inline-block;
		margin-right: 20px;
		cursor: pointer;
	}

	.todo-footer label input {
		position: relative;
		top: -1px;
		vertical-align: middle;
		margin-right: 5px;
	}

	.todo-footer button {
		float: right;
		margin-top: 5px;
	}
</style>
